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<?php
/**
* @package Polylang
*/
/**
* Extends the PLL_Model class with methods needed only in Polylang settings pages.
*
* @since 1.2
*/
class PLL_Admin_Model extends PLL_Model {
/**
* Adds a new language
* and creates a default category for this language.
*
* @since 1.2
*
* @param array $args {
* @type string $name Language name (used only for display).
* @type string $slug Language code (ideally 2-letters ISO 639-1 language code).
* @type string $locale WordPress locale. If something wrong is used for the locale, the .mo files will
* not be loaded...
* @type int $rtl 1 if rtl language, 0 otherwise.
* @type int $term_group Language order when displayed.
* @type string $no_default_cat Optional, if set, no default category will be created for this language.
* @type string $flag Optional, country code, {@see settings/flags.php}.
* }
* @return WP_Error|true true if success / WP_Error if failed.
*/
public function add_language( $args ) {
$errors = $this->validate_lang( $args );
if ( $errors->has_errors() ) {
return $errors;
}
// First the language taxonomy
$r = wp_insert_term(
$args['name'],
'language',
array(
'slug' => $args['slug'],
'description' => $this->build_language_metas( $args ),
)
);
if ( is_wp_error( $r ) ) {
// Avoid an ugly fatal error if something went wrong ( reported once in the forum )
return new WP_Error( 'pll_add_language', __( 'Impossible to add the language.', 'polylang' ) );
}
wp_update_term( (int) $r['term_id'], 'language', array( 'term_group' => (int) $args['term_group'] ) ); // can't set the term group directly in wp_insert_term
// The other language taxonomies.
$this->update_secondary_language_terms( $args['slug'], $args['name'] );
if ( ! isset( $this->options['default_lang'] ) ) {
// If this is the first language created, set it as default language
$this->options['default_lang'] = $args['slug'];
update_option( 'polylang', $this->options );
}
// Refresh languages.
$this->clean_languages_cache();
$this->get_languages_list();
flush_rewrite_rules(); // Refresh rewrite rules.
/**
* Fires when a language is added.
*
* @since 1.9
*
* @param array $args Arguments used to create the language. @see PLL_Admin_Model::add_language().
*/
do_action( 'pll_add_language', $args );
return true;
}
/**
* Delete a language.
*
* @since 1.2
*
* @param int $lang_id Language term_id.
* @return bool
*/
public function delete_language( $lang_id ) {
$lang = $this->get_language( (int) $lang_id );
if ( empty( $lang ) ) {
return false;
}
// Oops ! we are deleting the default language...
// Need to do this before loosing the information for default category translations
if ( $lang->is_default ) {
$slugs = $this->get_languages_list( array( 'fields' => 'slug' ) );
$slugs = array_diff( $slugs, array( $lang->slug ) );
if ( ! empty( $slugs ) ) {
$this->update_default_lang( reset( $slugs ) ); // Arbitrary choice...
} else {
unset( $this->options['default_lang'] );
}
}
// Delete the translations
$this->update_translations( $lang->slug );
// Delete language option in widgets
foreach ( $GLOBALS['wp_registered_widgets'] as $widget ) {
if ( ! empty( $widget['callback'][0] ) && ! empty( $widget['params'][0]['number'] ) ) {
$obj = $widget['callback'][0];
$number = $widget['params'][0]['number'];
if ( is_object( $obj ) && method_exists( $obj, 'get_settings' ) && method_exists( $obj, 'save_settings' ) ) {
$settings = $obj->get_settings();
if ( isset( $settings[ $number ]['pll_lang'] ) && $settings[ $number ]['pll_lang'] == $lang->slug ) {
unset( $settings[ $number ]['pll_lang'] );
$obj->save_settings( $settings );
}
}
}
}
// Delete menus locations
if ( ! empty( $this->options['nav_menus'] ) ) {
foreach ( $this->options['nav_menus'] as $theme => $locations ) {
foreach ( array_keys( $locations ) as $location ) {
unset( $this->options['nav_menus'][ $theme ][ $location ][ $lang->slug ] );
}
}
}
// Delete users options
delete_metadata( 'user', 0, 'pll_filter_content', '', true );
delete_metadata( 'user', 0, "description_{$lang->slug}", '', true );
// Delete domain
unset( $this->options['domains'][ $lang->slug ] );
/*
* Delete the language itself.
*
* Reverses the language taxonomies order is required to make sure 'language' is deleted in last.
*
* The initial order with the 'language' taxonomy at the beginning of 'PLL_Language::term_props' property
* is done by {@see PLL_Model::filter_language_terms_orderby()}
*/
foreach ( array_reverse( $lang->get_tax_props( 'term_id' ) ) as $taxonomy_name => $term_id ) {
wp_delete_term( $term_id, $taxonomy_name );
}
// Refresh languages.
$this->clean_languages_cache();
$this->get_languages_list();
update_option( 'polylang', $this->options );
flush_rewrite_rules(); // refresh rewrite rules
return true;
}
/**
* Updates language properties.
*
* @since 1.2
*
* @param array $args {
* @type int $lang_id Id of the language to modify.
* @type string $name Language name ( used only for display ).
* @type string $slug Language code ( ideally 2-letters ISO 639-1 language code ).
* @type string $locale WordPress locale. If something wrong is used for the locale, the .mo files will not be loaded...
* @type int $rtl 1 if rtl language, 0 otherwise.
* @type int $term_group Language order when displayed.
* @type string $flag Optional, country code, @see flags.php.
* }
* @return WP_Error|true true if success / WP_Error if failed.
*/
public function update_language( $args ) {
$lang = $this->get_language( (int) $args['lang_id'] );
if ( empty( $lang ) ) {
return new WP_Error( 'pll_invalid_language_id', __( 'The language does not seem to exist.', 'polylang' ) );
}
$errors = $this->validate_lang( $args, $lang );
if ( $errors->get_error_code() ) { // Using has_errors() would be more meaningful but is available only since WP 5.0
return $errors;
}
// Update links to this language in posts and terms in case the slug has been modified
$slug = $args['slug'];
$old_slug = $lang->slug;
if ( $old_slug != $slug ) {
// Update the language slug in translations
$this->update_translations( $old_slug, $slug );
// Update language option in widgets
foreach ( $GLOBALS['wp_registered_widgets'] as $widget ) {
if ( ! empty( $widget['callback'][0] ) && ! empty( $widget['params'][0]['number'] ) ) {
$obj = $widget['callback'][0];
$number = $widget['params'][0]['number'];
if ( is_object( $obj ) && method_exists( $obj, 'get_settings' ) && method_exists( $obj, 'save_settings' ) ) {
$settings = $obj->get_settings();
if ( isset( $settings[ $number ]['pll_lang'] ) && $settings[ $number ]['pll_lang'] == $old_slug ) {
$settings[ $number ]['pll_lang'] = $slug;
$obj->save_settings( $settings );
}
}
}
}
// Update menus locations
if ( ! empty( $this->options['nav_menus'] ) ) {
foreach ( $this->options['nav_menus'] as $theme => $locations ) {
foreach ( array_keys( $locations ) as $location ) {
if ( ! empty( $this->options['nav_menus'][ $theme ][ $location ][ $old_slug ] ) ) {
$this->options['nav_menus'][ $theme ][ $location ][ $slug ] = $this->options['nav_menus'][ $theme ][ $location ][ $old_slug ];
unset( $this->options['nav_menus'][ $theme ][ $location ][ $old_slug ] );
}
}
}
}
// Update domains
if ( ! empty( $this->options['domains'][ $old_slug ] ) ) {
$this->options['domains'][ $slug ] = $this->options['domains'][ $old_slug ];
unset( $this->options['domains'][ $old_slug ] );
}
// Update the default language option if necessary
if ( $lang->is_default ) {
$this->options['default_lang'] = $slug;
}
}
update_option( 'polylang', $this->options );
// And finally update the language itself.
$this->update_secondary_language_terms( $args['slug'], $args['name'], $lang );
$description = $this->build_language_metas( $args );
wp_update_term( $lang->get_tax_prop( 'language', 'term_id' ), 'language', array( 'slug' => $slug, 'name' => $args['name'], 'description' => $description, 'term_group' => (int) $args['term_group'] ) );
// Refresh languages.
$this->clean_languages_cache();
$this->get_languages_list();
// Refresh rewrite rules.
flush_rewrite_rules();
/**
* Fires after a language is updated.
*
* @since 1.9
* @since 3.2 Added $lang parameter.
*
* @param array $args {
* Arguments used to modify the language. @see PLL_Admin_Model::update_language().
*
* @type string $name Language name (used only for display).
* @type string $slug Language code (ideally 2-letters ISO 639-1 language code).
* @type string $locale WordPress locale.
* @type int $rtl 1 if rtl language, 0 otherwise.
* @type int $term_group Language order when displayed.
* @type string $no_default_cat Optional, if set, no default category has been created for this language.
* @type string $flag Optional, country code, @see flags.php.
* }
* @param PLL_Language $lang Previous value of the language being edited.
*/
do_action( 'pll_update_language', $args, $lang );
return true;
}
/**
* Builds the language metas into an array and serializes it, to be stored in the term description.
*
* @since 3.4
*
* @param array $args {
* @type string $name Language name (used only for display).
* @type string $slug Language code (ideally 2-letters ISO 639-1 language code).
* @type string $locale WordPress locale. If something wrong is used for the locale, the .mo files will not be
* loaded...
* @type int $rtl 1 if rtl language, 0 otherwise.
* @type int $term_group Language order when displayed.
* @type int $lang_id Optional, ID of the language to modify. An empty value means the language is being
* created.
* @type string $flag Optional, country code, {@see settings/flags.php}.
* }
* @return string The serialized description array updated.
*/
protected function build_language_metas( array $args ) {
if ( ! empty( $args['lang_id'] ) ) {
$language_term = get_term( (int) $args['lang_id'] );
if ( $language_term instanceof WP_Term ) {
$old_data = maybe_unserialize( $language_term->description );
}
}
if ( empty( $old_data ) || ! is_array( $old_data ) ) {
$old_data = array();
}
$new_data = array(
'locale' => $args['locale'],
'rtl' => ! empty( $args['rtl'] ) ? 1 : 0,
'flag_code' => empty( $args['flag'] ) ? '' : $args['flag'],
);
/**
* Allow to add data to store for a language.
* `$locale`, `$rtl`, and `$flag_code` cannot be overwritten.
*
* @since 3.4
*
* @param mixed[] $add_data Data to add.
* @param mixed[] $args {
* Arguments used to create the language.
*
* @type string $name Language name (used only for display).
* @type string $slug Language code (ideally 2-letters ISO 639-1 language code).
* @type string $locale WordPress locale. If something wrong is used for the locale, the .mo files will
* not be loaded...
* @type int $rtl 1 if rtl language, 0 otherwise.
* @type int $term_group Language order when displayed.
* @type int $lang_id Optional, ID of the language to modify. An empty value means the language is
* being created.
* @type string $flag Optional, country code, {@see settings/flags.php}.
* }
* @param mixed[] $new_data New data.
* @param mixed[] $old_data {
* Original data. Contains at least the following:
*
* @type string $locale WordPress locale.
* @type int $rtl 1 if rtl language, 0 otherwise.
* @type string $flag_code Country code.
* }
*/
$add_data = apply_filters( 'pll_language_metas', array(), $args, $new_data, $old_data );
// Don't allow to overwrite `$locale`, `$rtl`, and `$flag_code`.
$new_data = array_merge( $old_data, $add_data, $new_data );
/** @var non-empty-string $serialized maybe_serialize() cannot return anything else than a string when fed by an array. */
$serialized = maybe_serialize( $new_data );
return $serialized;
}
/**
* Validates data entered when creating or updating a language.
*
* @see PLL_Admin_Model::add_language().
*
* @since 0.4
*
* @param array $args Parameters of {@see PLL_Admin_Model::add_language() or @see PLL_Admin_Model::update_language()}.
* @param PLL_Language|null $lang Optional the language currently updated, the language is created if not set.
* @return WP_Error
*/
protected function validate_lang( $args, $lang = null ) {
$errors = new WP_Error();
// Validate locale with the same pattern as WP 4.3. See #28303
if ( ! preg_match( '#^[a-z]{2,3}(?:_[A-Z]{2})?(?:_[a-z0-9]+)?$#', $args['locale'], $matches ) ) {
$errors->add( 'pll_invalid_locale', __( 'Enter a valid WordPress locale', 'polylang' ) );
}
// Validate slug characters
if ( ! preg_match( '#^[a-z_-]+$#', $args['slug'] ) ) {
$errors->add( 'pll_invalid_slug', __( 'The language code contains invalid characters', 'polylang' ) );
}
// Validate slug is unique
foreach ( $this->get_languages_list() as $language ) {
if ( $language->slug === $args['slug'] && ( null === $lang || $lang->term_id !== $language->term_id ) ) {
$errors->add( 'pll_non_unique_slug', __( 'The language code must be unique', 'polylang' ) );
}
}
// Validate name
// No need to sanitize it as wp_insert_term will do it for us
if ( empty( $args['name'] ) ) {
$errors->add( 'pll_invalid_name', __( 'The language must have a name', 'polylang' ) );
}
// Validate flag
if ( ! empty( $args['flag'] ) && ! is_readable( POLYLANG_DIR . '/flags/' . $args['flag'] . '.png' ) ) {
$flag = PLL_Language::get_flag_informations( $args['flag'] );
if ( ! empty( $flag['url'] ) ) {
$response = function_exists( 'vip_safe_wp_remote_get' ) ? vip_safe_wp_remote_get( esc_url_raw( $flag['url'] ) ) : wp_remote_get( esc_url_raw( $flag['url'] ) );
}
if ( empty( $response ) || is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {
$errors->add( 'pll_invalid_flag', __( 'The flag does not exist', 'polylang' ) );
}
}
return $errors;
}
/**
* Updates the translations when a language slug has been modified in settings
* or deletes them when a language is removed.
*
* @since 0.5
*
* @param string $old_slug The old language slug.
* @param string $new_slug Optional, the new language slug, if not set it means that the language has been deleted.
* @return void
*/
public function update_translations( $old_slug, $new_slug = '' ) {
global $wpdb;
$term_ids = array();
$dr = array();
$dt = array();
$ut = array();
$taxonomies = $this->translatable_objects->get_taxonomy_names( array( 'translations' ) );
$terms = get_terms( array( 'taxonomy' => $taxonomies ) );
if ( is_array( $terms ) ) {
foreach ( $terms as $term ) {
$term_ids[ $term->taxonomy ][] = $term->term_id;
$tr = maybe_unserialize( $term->description );
/**
* Filters the unserialized translation group description before it is
* updated when a language is deleted or a language slug is changed.
*
* @since 3.2
*
* @param (int|string[])[] $tr {
* List of translations with lang codes as array keys and IDs as array values.
* Also in this array:
*
* @type string[] $sync List of synchronized translations with lang codes as array keys and array values.
* }
* @param string $old_slug The old language slug.
* @param string $new_slug The new language slug.
* @param WP_Term $term The term containing the post or term translation group.
*/
$tr = apply_filters( 'update_translation_group', $tr, $old_slug, $new_slug, $term );
if ( ! empty( $tr[ $old_slug ] ) ) {
if ( $new_slug ) {
$tr[ $new_slug ] = $tr[ $old_slug ]; // Suppress this for delete
} else {
$dr['id'][] = (int) $tr[ $old_slug ];
$dr['tt'][] = (int) $term->term_taxonomy_id;
}
unset( $tr[ $old_slug ] );
if ( empty( $tr ) || 1 == count( $tr ) ) {
$dt['t'][] = (int) $term->term_id;
$dt['tt'][] = (int) $term->term_taxonomy_id;
} else {
$ut['case'][] = $wpdb->prepare( 'WHEN %d THEN %s', $term->term_id, maybe_serialize( $tr ) );
$ut['in'][] = (int) $term->term_id;
}
}
}
}
// Delete relationships
if ( ! empty( $dr ) ) {
// PHPCS:disable WordPress.DB.PreparedSQL.NotPrepared
$wpdb->query(
"DELETE FROM $wpdb->term_relationships
WHERE object_id IN ( " . implode( ',', $dr['id'] ) . ' )
AND term_taxonomy_id IN ( ' . implode( ',', $dr['tt'] ) . ' )'
);
// PHPCS:enable
}
// Delete terms
if ( ! empty( $dt ) ) {
$wpdb->query( "DELETE FROM $wpdb->terms WHERE term_id IN ( " . implode( ',', $dt['t'] ) . ' )' ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared
$wpdb->query( "DELETE FROM $wpdb->term_taxonomy WHERE term_taxonomy_id IN ( " . implode( ',', $dt['tt'] ) . ' )' ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared
}
// Update terms
if ( ! empty( $ut ) ) {
// PHPCS:disable WordPress.DB.PreparedSQL.NotPrepared
$wpdb->query(
"UPDATE $wpdb->term_taxonomy
SET description = ( CASE term_id " . implode( ' ', $ut['case'] ) . ' END )
WHERE term_id IN ( ' . implode( ',', $ut['in'] ) . ' )'
);
// PHPCS:enable
}
if ( ! empty( $term_ids ) ) {
foreach ( $term_ids as $taxonomy => $ids ) {
clean_term_cache( $ids, $taxonomy );
}
}
}
/**
* Updates the default language
* taking care to update the default category & the nav menu locations.
*
* @since 1.8
*
* @param string $slug New language slug.
* @return void
*/
public function update_default_lang( $slug ) {
// The nav menus stored in theme locations should be in the default language
$theme = get_stylesheet();
if ( ! empty( $this->options['nav_menus'][ $theme ] ) ) {
$menus = array();
foreach ( $this->options['nav_menus'][ $theme ] as $key => $loc ) {
$menus[ $key ] = empty( $loc[ $slug ] ) ? 0 : $loc[ $slug ];
}
set_theme_mod( 'nav_menu_locations', $menus );
}
/**
* Fires when a default language is updated.
*
* @since 3.1
*
* @param string $slug Slug.
*/
do_action( 'pll_update_default_lang', $slug );
// Update options
$this->options['default_lang'] = $slug;
update_option( 'polylang', $this->options );
$this->clean_languages_cache();
flush_rewrite_rules();
}
}